Bruce

I just purchased an 88gxl about 3 months ago. I have tried to do as much work on it as posible. So far I had the engine rebuilt, did most of the poly urethane suspension upgrade. Currently I'm working on the suspension.
1. But was just wondering what mods would be suggested to create torque in this engine?
(Would like to keep it N/A if possible.)

DrifterFD3S

you are probably going to be hard pressed to find a way of making low-end torque in a rotary. ask around, but theres not much you can do other than to turbo it to make any.

Blowtus

not possible to keep it na in that case.

nonameo

even with a turbo anything below 3500 will still bite pretty bad.

dr0x

1987RX7guy

iTrader: (3)

V8 swap.


That hurts to say.

BDoty311

Im sorry to say, but you should have streetported it when you had the motor apart. Adding a full exhaust system will help out dramatically, and a cold air intake will compliment that nicely.

Fingers

streetporting will help with low end torque? Man, that's a good one. Perhaps wiring your sleeves open will give you more bottom end too?

converted

wiring the ports open will kill your low end, they were designed to be closed under 4,000 rpms to help with the low end torque and open after 4,000 to increase air flow and give more high end power

BDoty311

Does your car have a streetport? Mine does and I garuntee it had more low-end torque after the streetport. The low-end might not be as spectacular as the top-end, but it is definately better than with stock ports. By low-end I mean 2500-4500rpm

BDoty311

He was joking.

SureShot

Since you are staying NA:
1) Make sure the aux ports (6-ports) are working.
2) Make sure the aux ports (6-ports) are working.
3) Make sure the aux ports (6-ports) are working.

Aaron Cake

iTrader: (1)

Streetporting will produce less low end torque due to the loss in intake velocity.

Best advice is to make sure the 6 port system is working properly (SEARCH!!!)...

If you want to go to extremes, forced induction is always possible. Both superchargers and turbochargers result in basically the same increase in low end, but are not small projects to undertake.

Also switching to a different rear end ratio will make a difference, as well as running smaller tires.

Fingers

That's midrange.

Either way, a small streetport would have little effect on the low end, but if anything it will affect it ADVERSELY. A large street port/bridge port will reduce low end dramatically.

Do I have one? No. But I researched the subject extensively. While the top end gains are incredible, the low rpm range will suffer. I'm sorry if it's hard to accept that, but it's true. Same with backpressure. Low end NEEDS backpressure to help suck the exhaust gasses out... there's a very large subject concerning exhaust pulses and how they help draw out the gasses, but we won't get into that.

Moral of this story, you wont get more low end by street porting your motor. Top end, yes.

BDoty311

Right......

Whatever.

BDoty311

Since when has changing your gear ratio and tire size increased torque?? And you guys thought my streetport statement was BS.

Cheers!

u want to make sure the exhaust piping is not more then 2.5 inches? i can't remember exactly consult mazdatrix for their true dual exhaust system

BDoty311

BTW- he asked how to make torque, and a streetport will do that. Maybe not in the low-end 0-2500rpm, but throughout the rest of the powerband it will.

Aaron Cake

iTrader: (1)

Smaller tires/new rear end will result in faster accelleration. Will give the illusion of more torque.

Porting will result in less low end, but better torque higher up.

Evil Aviator

Only since the invention of the wheel.

The torque increase isn't an illusion, it is real.
http://www.geocities.com/budb3/arts/gear/gfun.html

In your defense, he did in fact ask how to create more torque. A streetport will produce more torque in the higher rpm band, which is known as horsepower to the layman. Therefore, you are technically correct.

For those who are not engineering geeks, Horsepower = Torque * rpm / 5252, so you can't have horsepower without torque.

Wankel7

I just love it when the knowledged ones lay the smack down with amazing tack

Your the man

James

rotary>piston

yes but a lot of hp doesn't equal a lot of torque. Just look at the Renesis (250hp, ~150 ft/lbs)

NA_VersionFC3S

I don't completly understand this.

So say you have 100 hp. At 5,252 RPM then you will have 100 ft/lb.??

So what if you relatively rev it up to 10,504 rpm's, you will have 50 ft/lb??

So does that mean if you keep it at a constant 2,626 rpm you will have 200 lb/ft.??

Please enlighten me.

Tim

Evil Aviator

Hence the rpm variable in the equation. However, you do bring up an interesting point in that horsepower may also increase with an increase in rpms.

Horsepower is simply torque relative to rpm, and nothing more.

Yes. (Technically it's lbs-ft, said as "pounds feet", even though "foot pounds" is common slang.)

Check out my Miss Cleo bit... With my Evil crystal ball I can see the next dyno sheet that you look at. Go ahead, choose one for any engine you like, just as long as the dyno sheet is in horsepower and lb-ft torque units (not Kw, Ps, or other units). Did you find a dyno sheet yet? OK, now with my amazing Evil powers I will predict that the horsepower and torque curves will meet at exactly 5252rpm. I got it right, didn't I? With my Evil crystal ball I can predict YOUR future by calling 900-EVL-AV8R for only $10/minute. All donations go toward the 20B money pit. The first 10 callers will receive a free bop in the head for not realizing a joke when they see one.

Yes, but only if the horsepower remains at a constant 100hp, which it will not do in any engine that I know of. You can't use the formula to predict horsepower or torque at different rpms because the engine output will vary. However, if you know two of the three variables, then you can solve for the unknown. For example, Mazda lists the peak torque of an S4 NA 13B at 138 lb-ft @ 3500 rpm. Given this information, our slick forumla shows that the engine will make 92 hp @ 3500 rpm.

JasonL

He prob thought he got more low end torque when he got his engine rebuilt/streetported because his engine was low compression before and since rebuilt it's got more low end torque with a rebuild than before the rebuild.